- Nov 24, 2007
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Hmmm.. When i bought the car the AC didnt work and i checked it and it was low on freon... I topped it off and i had ice cold ac for a day! next day it didnt work checked the pressure... it was fine! compressor kicks on kicks off kicks on kicks off thats all it does.. tried adding a wee bit more freon and it still did the same thing.. Im thinking... pressure switch or clogged orfice tube?? what is involved with changing the pressure switch on these cars?
You need to hook up a set of guages and look at liquid and suction pressures. If the orifice tube is blocked, suction pressure will be low and pressure line may be high (or not). Also you need to verify that the blend-air door is moving and that it isn't stuck in a partially-open mode where some of the cabin air goes through the heater core making it look like the A/C is not working properly.
If compressor is kicking on and off, it doesn't sound like a plugged orifice tube. Is the drier cold to the touch?
to add to this, is the compressor short cycling? by that I mean cyling off after about a second if it is then most likely you are low on freeon and have a leak.
BTW good call on the blend door I have seen that burn people.